-int po_rightmost(struct mount_options *, char *, char *);
-int po_remove_all(struct mount_options *, char *);
+po_found_t po_get_numeric(struct mount_options *,
+ char *, long *);
+int po_rightmost(struct mount_options *,
+ const char *keys[]);
+po_found_t po_remove_all(struct mount_options *, char *);